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/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved.
*/
#ifndef _RDMA_CORE_RESTRACK_H_
#define _RDMA_CORE_RESTRACK_H_
#include <linux/mutex.h>
#include <linux/rwsem.h>
/**
* struct rdma_restrack_root - main resource tracking management
* entity, per-device
*/
struct rdma_restrack_root {
/*
* @rwsem: Read/write lock to protect erase of entry.
* Lists and insertions are protected by XArray internal lock.
*/
struct rw_semaphore rwsem;
/**
* @xa: Array of XArray structures to hold restrack entries.
* We want to use array of XArrays because insertion is type
* dependent. For types with xisiting unique ID (like QPN),
* we will insert to that unique index. For other types,
* we insert based on pointers and auto-allocate unique index.
*/
struct xarray xa[RDMA_RESTRACK_MAX];
/**
* @next_id: Next ID to support cyclic allocation
*/
u32 next_id[RDMA_RESTRACK_MAX];
};
int rdma_restrack_init(struct ib_device *dev);
void rdma_restrack_clean(struct ib_device *dev);
#endif /* _RDMA_CORE_RESTRACK_H_ */
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